Comment 4 for bug 1507738

Reviewed: https://review.openstack.org/250745
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=f968e1a22d3ed928278a04f0da9124678474ff0a
Submitter: Jenkins
Branch: master

commit f968e1a22d3ed928278a04f0da9124678474ff0a
Author: Dmitry Tantsur <email address hidden>
Date: Fri Nov 27 11:59:32 2015 +0100

    Fall back to old boot.ipxe behaviour if inc command is not found

    We introduced looping over all NIC's as on older iPXE ROM's ${mac} variable
    does not always point to the PXE-booting NIC. However, CentOS/RHEL ship
    even older iPXE ROM that does not even have inc command at all.

    This patch restores the old behaviour of relying on ${mac} variable when
    inc command cannot be executed. It's still not perfect and might break
    sometimes, but it won't be completely broken. Nothing is changes for users
    for which inc command is already working.

    Change-Id: I30b8c0e4ab076684ea9baa042e5a9a4f44da9a3a
    Closes-Bug: #1507738